Good morning! When you see the pop-up message "Do you want to allow this app to make changes to your device?", it is referred to as the User Account Control (UAC) prompt in Windows. This prompt is designed to notify you when an application requires administrative access to your system.
By choosing "Yes" in the UAC prompt, you granted the application (in this case, COD Modern Warfare II) permission to make changes on your device. These changes might include modifying system files, installing components, or making other adjustments necessary for the game to run correctly.
If you accidentally clicked "Yes" and want to revoke the permissions, you can do so by following these steps:
1. Press the Windows key + I on your keyboard to open the Settings app.
2. Select "Update & Security."
3. Click on "Windows Security" from the left-hand side menu.
4. Choose "Virus & threat protection."
5. Under the "Virus & threat protection settings" section, click on "Manage settings."
6. Scroll down and locate "Controlled folder access," then click on "Manage Controlled folder access."
7. Toggle the switch labeled "Controlled folder access" to the "Off" position.
By turning off Controlled folder access, you will no longer receive UAC prompts for applications that require administrative access. However, it is important to note that this may decrease the security level of your system, as it helps safeguard your files and folders from unauthorized changes.
Alternatively, you can also consider adding the game or the Steam application itself to the list of allowed apps in Controlled folder access. This way, you can continue receiving UAC prompts for other applications while granting permission only to specific ones.
I hope this helps! If you have any further questions, feel free to ask.